Plow-point.



No. 632,274. Patented'Sept. 5, I899.

D. H. MOORE.

P L 0 W PU I N T Application filed mi. 23, 1599.

(No Model.)

WITNESSES.

UNTTED STATES PATENT OFFICE.

DELMER H. MOORE, OF GREENVILLE, MICHIGAN.

PLOW-POINT.

SPECIFICATION forming part of Letters Patent No. 632,274, datedSeptember 5, 1899.

Application filed January 23, 1899. Serial No. 7( )3,038. (N0 model.)

To all whom it may concern.-

Be it known that I, DELMER H. MOORE, a citizen of the United States,residing at Green ville, in the county of Montcalm, State of Michigan,have invented certain new and useful Improvements in Plow-Points; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to new and useful improvements in plowshares; anditconsists more particularly in the formation of the plow-point,ashereinafter more fully set forth, and pointed out in the claim.

The object of the invention is to provide a plowshare with a point whichwill not wear round on its under face, but which by the action of theplow will wear evenly in a horizontal plane, obviating the rounding ofthe point from the under side and the consequent tendency of the plow torun out of the ground. This object is attained by the construction ofplowshare illustrated in the accompanying drawings, in which- Figure 1is a perspective View of the under side of the plowshare provided withmy improved point. Fig. 2 is a side elevation of same, parts beingbroken away. Fig. 3 is an inverted plan view of the plow point and share, parts being broken away.

The plowshare as ordinarily constructed is provided with a fiat base ona line with the forward point thereof, from which point the line of theshare slopes upwardly on the upper side. At first a plow-point soconstructed gives good service; but in a short time the wear upon theunder side of the point being greater than any other place wears thepoint rounding upon the under side, rendering it difficult to keep theplowin the ground. To overcome this difficulty, plowpoints have beenprovided with an offset or projection extending below the base of theplowshare and backward some distance from the point. This offset orprojection being solid, as much material is embraced in the rear edgethereof as at the forward edge or point. As the wear is always greaterat the extreme point of the share, said shoulder does not wear evenlyaway, but, on the contrary, wears much faster at the point than at theheel, so that in time a plow-point provided with an offset or projectionwill wear rounding on its under face notwithstanding said projection,and while it will perhaps wear longer than a plain point without saidoffset it in time becomes quite as useless. To overcome said objectionsand provide a plowshare with a'pointwhich gradually wears sharper andflatter on its under face, I provide the plow-point Aof thevplowshare B,as shown in the drawings, with a se-' ries of V-shaped lugs a on itsunder face,

which project below the base of the plowshare and extend forward to thepoint. The bases of said conical lugs extend forward to the extremepoint of the plow, at which point said bases stand practicallycontiguous, while the apices of said lugs extend rearwardly andgradually recede to their point of termination, so that said lugs at therear are separated by interposed spaces. By means of the formation abovedescribed it will be seen that the wear upon said lugs will bepractically uniform, their greatest area being presented forward at thepoint where there is the greatest wear, while their reduced area extendsgradually rearwardly in proportion to the amount of wear thereon, so asto make the wear at their extreme rear points equal to. that at theirbases or forward ends, by which means the horizontal plane of the underface of the point is always maintained, keeping said point, in effect,both flat and sharp.

Having thus fully set forth this invention, what I claim is A plow-pointprovided at the extreme or cutting edge of the point thereof with aseries of depending lugs tapering in form whose greatest width liesforward in line with said cutting edge and whose reduced area extendsrearwardly from said edge.

In testimony whereof I sign this specification in the presence of twowitnesses.

DELMER H. MOORE.

Witnesses:

GEO. R. SLAWSON, WM. W. SLAwsoN.

